var SignUpForm = Backbone.View.extend({
    events: {
        'click #signUpButton': function (e) {
            e.preventDefault();
            this.signUp();
        }
    },

    initialize: function () {
        // This hooks up the validation
        // See: http://thedersen.com/projects/backbone-validation/#using-form-model-validation/validation-binding
        Backbone.Validation.bind(this);
    },

    signUp: function () {
        var data = this.$el.serializeObject();

        this.model.set(data);

        var modelValid = this.model.isValid(true);
        console.log('model valid', modelValid);

        var modelValidUsername = this.model.username.isValid(true);
        console.log('model username valid', modelValidUsername);

        var modelValidEmail = this.model.email.isValid(true);
        console.log('model email valid', modelValidEmail);

        // Check if the model is valid before saving
        // See: http://thedersen.com/projects/backbone-validation/#methods/isvalid
        if(this.model.isValid(true)){
            // this.model.save();
            alert('Great Success!');
        }
    },

    remove: function() {
        // Remove the validation binding
        // See: http://thedersen.com/projects/backbone-validation/#using-form-model-validation/unbinding
        Backbone.Validation.unbind(this);
        return Backbone.View.prototype.remove.apply(this, arguments);
    }
});

var SignUpModel = Backbone.Model.extend({
    defaults: {
        terms: false,
        gender: ''
    },
    validation: {
        username: {
            required: true,
            minLength: 3
        },
        email: {
            required: true,
            pattern: 'email'
        },
        password: {
            minLength: 4
        },
        repeatPassword: {
            equalTo: 'password',
            msg: 'The passwords does not match'
        }
    }
});

// Extend the callbacks to work with Bootstrap, as used in this example
// See: http://thedersen.com/projects/backbone-validation/#configuration/callbacks
_.extend(Backbone.Validation.callbacks, {
    valid: function (view, attr, selector) {
        var $el = view.$('[name=' + attr + ']'),
            $group = $el.closest('.form-group');

        $group.removeClass('has-error');
        $group.find('.help-block').html('').addClass('hidden');
    },
    invalid: function (view, attr, error, selector) {
        var $el = view.$('[name=' + attr + ']'),
            $group = $el.closest('.form-group');

        $group.addClass('has-error');
        $group.find('.help-block').html(error).removeClass('hidden');
    }
});


// https://github.com/hongymagic/jQuery.serializeObject
$.fn.serializeObject = function () {
    "use strict";
    var a = {}, b = function (b, c) {
        var d = a[c.name];
        "undefined" != typeof d && d !== null ? $.isArray(d) ? d.push(c.value) : a[c.name] = [d, c.value] : a[c.name] = c.value
    };
    return $.each(this.serializeArray(), b), a
};

$(function () {
    var view = new SignUpForm({
      el: 'form',
      model: new SignUpModel()
    });
  });